[WOTLK] DK Runes

All those functions are returning 2 or 0 but not 1

ObjectManager.Me.GetRunesReady(RuneTypes.Frost).Count;
ObjectManager.Me.GetRunes().Where(r => r.RuneType == runeType && r.IsReady).Count();

Returns 2 if both runes of the same type are ready, but if one of them is used it returns 0 and not 1.

Should:
Return 2 if both are ready and 1 if one of them is used, otherwise 0.